CN109672956A - Apparatus for processing audio and its audio-frequency processing method - Google Patents
Apparatus for processing audio and its audio-frequency processing method Download PDFInfo
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- CN109672956A CN109672956A CN201710961840.8A CN201710961840A CN109672956A CN 109672956 A CN109672956 A CN 109672956A CN 201710961840 A CN201710961840 A CN 201710961840A CN 109672956 A CN109672956 A CN 109672956A
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- signal processor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers
Abstract
The present invention provides a kind of apparatus for processing audio and its audio-frequency processing method, belongs to Audiotechnica field.The apparatus for processing audio includes: locating unit, detects a home position and the latest position of a user, calculates an offset of the latest position Yu the home position；One digital signal processor, it is electrically connected the positioning unit, an audio data is received generating the surrounding sound field with multiple virtual speaker audios, and receives the offset, the multiple virtual speaker audio of the surrounding sound field is adjusted according to the offset.User other than it can listen to surrounding sound field, can also do the variation on sound field according to the latest position of user, user is allowed to watch audio-visual Shi Gengyou telepresenc in ornamental video content, possess more preferably visual and sound effects experience.
Description
Technical field
The present invention relates to apparatus for processing audio, in particular to change the audio processing dress of sound field with user's change location
It sets and its method.
Background technique
User is watched movie using general AV device, plays game or use virtual reality (Virtual at present
Reality, VR) device when, no matter as shown in Figure 1, user 100 relative to curved screen 110 position variation whether,
User 100 hears that the sound size of earphone 120 is all identical, and whether uses earphone 120 or other entity loudspeakers, produces
Raw sound field all will not ensue variation with the position change of user 100, and user 100 is caused to experience in audio-visual
The sound bearing of appearance may be incorrect.
Summary of the invention
The present invention provides a kind of apparatus for processing audio and its method for changing sound field with user's change location.
One embodiment of the invention discloses a kind of apparatus for processing audio, comprising: locating unit, the one of one user of detection
Home position and a latest position calculate an offset of the latest position Yu the home position；One digital signal processor, electricity
Property connect the positioning unit, receive an audio data to generate the surrounding sound field with multiple virtual speaker audios, with
And the offset is received, the multiple virtual speaker audio of the surrounding sound field is adjusted according to the offset.
The present invention also discloses a kind of audio-frequency processing method, is used for an apparatus for processing audio, comprising: fill by the audio processing
The digital signal processor set receives an audio data to generate the circular sound with multiple virtual speaker audios
?；By the locating unit of the apparatus for processing audio, a home position and the latest position of a user are detected, calculating should
One offset of latest position and the home position；The offset is received by the digital signal processor, according to the offset
Adjust the multiple virtual speaker audio of the surrounding sound field.
Based on embodiment provided by the invention, user is in ornamental video content, in addition to that can listen to surrounding sound field
Except, the variation on sound field can be also done according to the latest position of user, and user is allowed to watch audio-visual Shi Gengyou telepresenc,
Possess more preferably visual and sound effects experience.
Detailed description of the invention
Fig. 1 is to show that user uses the schematic diagram of general AV device.
Fig. 2A is the schematic diagram according to the apparatus for processing audio of first embodiment of the invention.
Fig. 2 B is the schematic diagram according to the apparatus for processing audio of second embodiment of the invention.
Fig. 3 A, 3B are the relative position schematic diagram of user, apparatus for processing audio and screen.
Fig. 4 is the audio-frequency processing method flow chart according to first embodiment of the invention.
Description of symbols:
100~user；
110~curved screen；
120~earphone；
200~apparatus for processing audio；
210~input interface unit；
220~positioning unit；
230~digital signal processor；
231~microphone interface；
240~output interface unit；
241~digital analog converter；
242~Earphone Amplifier；
243~multichannel amplifier；
250~microphone；
260~PC；
270~audio output device；
271~earphone；
272~multi-channel loudspeaker；
300~apparatus for processing audio；
301~earphone；
310~user；
320~screen；
321~screen foot prop；
330~virtual speaker；
401,402,403,404,405~step；
δ~deviation angle；
MUTE, VOL_UP, VOL_DOWN~setting instruction；
XYZ_CAL~correction instruction.
Specific embodiment
To enable above and other objects, features and advantages of the invention to be clearer and more comprehensible, preferably implementation is cited below particularly out
Example, and cooperate Figure of description, it is described in detail below.
Fig. 2A is the schematic diagram of the apparatus for processing audio 200 according to first embodiment of the invention.Apparatus for processing audio
200 mainly include input interface unit 210, positioning unit 220, digital signal processor 230 and output interface unit 240.Sound
Frequency processing device 200 receives the video-audio data for coming from PC (PC) 260, after the processing of apparatus for processing audio 200, by
Audio output device 270 exports sound to a user (figure is not painted).Apparatus for processing audio 200 can be headphone,
Wear-type devices or the wearable devices such as the competing earphone of electricity, intelligent glasses, head-mounted display, virtual reality device.
In this embodiment, the video content that PC 260 is played according to user, passes through universal serial bus
(USB) or high picture quantity multimedia interface (High Definition Multimedia Interface, HDMI) or other can pass
The transport interface of defeated video-audio data transmits video-audio data to apparatus for processing audio 200, and PC 260 can also directly transmit sound
Frequency is according to (audio data) to apparatus for processing audio 200.In other embodiments, apparatus for processing audio 200 also can receive
From game machine, multimedia player (such as: DVD player, blue-light compact disc player), walkman, smart phone, plate electricity
The video-audio data or audio data of brain, laptop, the embodiment of the present invention are not limited to this.
Input interface unit 210 receives the video-audio data from PC 260, and video-audio data is converted to video counts
According to and audio data, aforementioned video data shown that aforementioned audio data are then passed by display device after necessary processing
It send to digital signal processor 230, audio data can be the audio data of stereo double channel.When PC 260 transmits
When audio data, input interface unit 210 is not converted to be directly sent to digital signal processor 230 for the audio data.Sound
Frequency evidence can pass through I2S(Integrated Interchip Sound)、HDA(High Definition Audio)、PCM
Any audio format interface such as (Pulse-Code Modulation) is sent to digital signal processor 230.
Positioning unit 220 is nine axis inductors, and the nine axis inductor is by 3-axis acceleration sensor
(Accelerometer), three-axle magnetic field sensor (Magnetometer) and three-axis gyroscope sensor (Gyroscope) institute structure
At to detect latest position and the home position of user, the user's location information detected of positioning unit 220 be can be
Rectangular coordinate system, polar coordinate system or cylindrical-coordinate system etc., the present invention is not limited thereto.When positioning unit 220 passes through digital signal
When processor 230 receives a correction instruction (XYZ_CAL) from user, positioning unit 220 is by the current location of user
It is set as home position, which is (X, Y, Z), and then constantly whether detection user has rotation or movement, if there is rotation
Turn or movement then detect its latest position (X1, Y1, Z1), and calculate latest position and home position an offset (X1-X,
Y1-Y, Z1-Z) and the offset is transmitted to digital signal processor 230.Method of the above-mentioned reception from user's correction instruction
It is included in apparatus for processing audio 200 button is arranged or input options are arranged in the software interface of PC 260, for using
Person inputs correction instruction, and is sent to digital signal processor 230.By taking Fig. 3 A as an example, when user has on earphone towards screen
When 320 centre (or given area) and input correction instruction, positioning unit detects the current position of user as original
Its new position after moving or turning to is detected, to obtain if user has shift position or touch turn later in position
The offset of new position and home position.
Digital signal processor 230 can be codec (codec), be electrically connected input interface unit 210 and positioning
Unit 220 receives audio data to generate surrounding sound field (the virtual surround with multiple virtual speaker audios
Sound), digital signal processor 230 is produced by the method that simulated sound positions using the effect of human ear audition principle
Around effect of the sound source from multiple virtual speakers such as user rear or side.Its analogy method includes strong using sound
Degree, phase difference, the time difference and pass through head related transfer function (Head Related Transfer Function, HRTF)
The methods of produce the virtual surrounding sound field, details does not repeat herein.For example, digital signal processor 230 can produce
The surrounding sound field of five virtual speaker audios of different direction is born, and can be adjusted respectively for the virtual speaker of different direction
Its whole yield value (gain) and/or output intensity.
In addition, digital signal processor 230 receives the offset from positioning unit 220, it should according to offset adjustment
The multiple virtual speaker audio of surrounding sound field.Digital signal processor 230 can calculate the offset, be converted to an offset
Angle, and judge whether the deviation angle is greater than a predetermined angle (for example, 5 degree), if the deviation angle is greater than predetermined angle,
The multiple virtual speaker audio is adjusted, if the deviation angle is less than or equal to predetermined angle, does not adjust the multiple void
Quasi- loudspeaker audio.Digital signal processor 230 is according to the deviation angle, corresponding the multiple virtual speaker audio of adjustment
Yield value (gain) and/or the multiple virtual speaker audio output intensity.
Output interface unit 240, receive come from the processed surrounding sound field of digital signal processor 230, to export to
Audio output device 270.Output interface unit 240 has digital analog converter (Digital to Analog
Converter, DAC) (figure is not painted), the surrounding sound field of digital signal is converted to analog signal, it is transmitted to rear class
Amplifier (figure is not painted), then push output to audio output device 270 by amplifier.
Audio output device 270 can be stereophone, hood type earphone, two-way speaker, multi-channel loudspeaker
Etc., the present invention is not limited thereto.Audio output device 270 receives the surrounding sound field from output interface unit 240, by double
Sound channel or multi-channel loudspeaker play to user's listening.
Fig. 2 B is the schematic diagram of the apparatus for processing audio 200 according to second embodiment of the invention.Apparatus for processing audio
200 mainly include input interface unit 210, positioning unit 220, digital signal processor 230, output interface unit 240 and wheat
Gram wind 250.In this embodiment with the element of same names in first embodiment, function is also as described above, no longer superfluous herein
It states.The main difference of Fig. 2 B and Fig. 2A are that apparatus for processing audio 200 further includes a microphone (MIC) 250, come to receive
Extraneous or user voice data, digital signal processor 230 further includes a microphone interface 231, carrys out Mike to receive
The voice data can be returned to PC 260 by output interface unit 240 and do subsequent processing by the voice data of wind 250
Or it is played by the output of output interface unit 240 to earphone 271 or multi-channel loudspeaker 272.Microphone interface 231 can be whole
Close impulse density modulation (Pulse-Density Modulation) and analog-digital converter (Analog to Digital
Converter, ADC) interface.In addition, digital signal processor 230 can receive the setting instruction from user, the setting
Instruction includes that volume tunes up (VOL_UP), volume turns the functions such as (VOL_DOWN) and mute (MUTE) down, and the setting of user refers to
Enabling can be by being set to the multiple buttons of apparatus for processing audio 200 or in the multiple inputs of software interface setting of PC 260
Option, so that user inputs customized settings instruction, so that the video/audio function of apparatus for processing audio 200 is more perfect.
In addition, in this embodiment, output interface unit 240 further includes multiple digital analog converters (DAC) 241, ear
Machine amplifier 242 and multichannel amplifier 243, exporting surrounding sound field to corresponding audio output device, audio
Output device is earphone 271 or multi-channel loudspeaker 272, the audio output that digital signal processor 230 is used according to user
Device selection exports surrounding sound field to corresponding earphone 271 or more by Earphone Amplifier 242 or multichannel amplifier 243
Channel loudspeaker 272, wherein earphone 271 can be stereo double channel earphone or two-way speaker, have L channel and the right side
Sound channel output, and multi-channel loudspeaker 272 can be 2.1 sound channels, 3.1 sound channels, 4.1 sound channels, 5.1 sound channels, 6.1 sound channels, 7.1 sound
The multi-channel loudspeakers groups such as road, 10.2 sound channels, 20.1 sound channels, the present invention is not limited thereto.Multi-channel loudspeaker 272 can be around
User periphery is to constitute the circular audio of family's theater.
Please refer to the relative position schematic diagram of the user 310 of Fig. 3 A and Fig. 3 B, apparatus for processing audio 300 and screen 320.
In this embodiment, user 310 is broadcast by the multimedia players such as PC, game machine, portable unit (figure is not painted)
Meaning video content is let alone, and puts on the collocation screen 320 of apparatus for processing audio 300 and watches movie, plays game or ornamental video content.It is glimmering
Curtain 320 can be the display devices such as curved screen, liquid crystal display, OLED display, and screen 320 can also include a screen foot
Frame 321, to support screen 320.Apparatus for processing audio 300 receives video content and produces multiple virtual speaker audios
Surrounding sound field, by the earphone 301 with stereo double channel play to user 310 listen to, enable user experience just like
More set virtual speakers make a sound around it.In the present embodiment, apparatus for processing audio 300 is in user
310 fictionalize five virtual speakers 330 by the side of, are virtual speaker A~E respectively.Audio processing dress is pressed in user 310
After setting 300 correction instruction, the current location of user 310 is set as raw bits by the positioning unit of apparatus for processing audio 300
It sets, and constantly detects the latest position of user 310 simultaneously.In the schematic diagram of Fig. 3 A, the home position of user 310 is
Face screen 320, deviation angle are 0 degree.
Then, Fig. 3 B is please referred to, user 310 has turned right (clockwise direction) deviation angle relative to screen 320
Spend (δ), the positioning unit of apparatus for processing audio 300 detects the latest position of user 310, calculate latest position with it is original
The offset of position and the digital signal processor for returning to apparatus for processing audio 300, digital signal processor calculate the offset
Amount is deviation angle, judges whether the deviation angle is greater than a predetermined angle, and for example, predetermined angle is 5 degree, if the offset
Angle is greater than 5 degree and then changes surrounding sound field, and is corresponded to table (as shown in Table 1) using a preset yield value, and the yield value is corresponding
Table adjusts its yield value (gain) to virtual speaker A~E respectively according to the deviation angle of user 310, changes different defeated
Intensity (being indicated with decibel dB) out, to achieve the effect that sound field changes.In one embodiment, when user 310 is from raw bits
0 degree set turned right 60 degree of (clockwise direction) when, then it is+9dB that virtual speaker A increases from+the 6dB of script, is virtually raised
Sound device B from the+3dB of script increase be+6dB, virtual speaker C from the+0dB of script increase be+3dB, and virtual speaker D from
+ the 3dB of script is reduced to+0dB, and virtual speaker E is reduced to+3dB from the+6dB of script.
The yield value of the corresponding different deviation angles of table one corresponds to table
In Table 1, though not arranging the correspondence output intensity of each deviation angle in detail, right the technical field of the invention technology
Personnel should be appreciated that the correspondence output intensity of other deviation angles.In addition, it should be appreciated that in the present embodiment, user
310 listen to surrounding sound field using earphone 301, and in other embodiments, 5.1 sound channel loudspeakings of entity also can be used in user 310
Device replaces earphone 301, plays the surrounding sound field.
Fig. 4 is the audio-frequency processing method flow chart according to first embodiment of the invention, is used for an apparatus for processing audio.Cooperation
With reference to Fig. 2A of first embodiment of the invention, in step 401, pass through the digital signal processor 230 of apparatus for processing audio 200
The correction instruction of user is received, positioning unit 220 sets the home position of user.In step 402, pass through audio processing
The digital signal processor 230 of device 200 receives audio data to generate the circular sound with multiple virtual speaker audios
, and export to audio output device 270 and play to user's listening.In step 403, pass through apparatus for processing audio 200
Positioning unit 220 detects the latest position of user, calculates the offset of latest position and home position.In step 404,
Judge whether the offset is greater than a predetermined angle by digital signal processor 230, if the offset is pre- less than or equal to this
If angle, then the multiple virtual speaker audio is not adjusted, and return to step 403, if the offset is greater than the predetermined angle,
Then enter step 405.In step 405, the institute of the surrounding sound field is adjusted according to the offset by digital signal processor 230
Multiple virtual speaker audios are stated, wherein adjust the multiple virtual speaker audio according to the deviation angle of the user,
The yield value (gain) of the multiple virtual speaker audio of corresponding adjustment and/or the multiple virtual speaker audio it is defeated
Intensity out, to achieve the effect that change surrounding sound field.
Further, in step 402, further include input interface unit 210 by apparatus for processing audio 200, connect
Video-audio data is received, which is converted into the audio data, the digital signal processor 230 is sent to and does subsequent processing.
In addition, further including the output interface unit 240 by apparatus for processing audio, the surrounding sound field is received, it is defeated to audio to export
Device 270 out.Wherein, which includes an Earphone Amplifier and a multichannel amplifier, this to surround
Sound field is exported to the corresponding audio output device 270.In addition, the audio output device 270 is an earphone or a multichannel
Loudspeaker, the digital signal processor 230 select to amplify the surrounding sound field by the earphone according to the audio output device 270
Device or the multichannel amplifier are exported to the corresponding earphone or the multi-channel loudspeaker.
Therefore, apparatus for processing audio and audio-frequency processing method through the invention, user remove in ornamental video content
It can listen to except surrounding sound field, the variation on sound field can be also done according to the latest position of user, user is allowed to exist
Audio-visual Shi Gengyou telepresenc is watched, more preferably visual and sound effects experience is possessed.
Although the present invention has been described by way of example and in terms of the preferred embodiments, however, it is not to limit the invention, any this field skill
Art personnel without departing from the spirit and scope of the present invention, when a little variation and retouching, therefore protection scope of the present invention can be done
When as defined in claim.
Claims (15)
1. a kind of apparatus for processing audio, comprising:
Locating unit detects a home position and the latest position of a user, calculates the latest position and the raw bits
The offset set；
One digital signal processor is electrically connected the positioning unit, receives an audio data and virtually raises to generate with multiple
One surrounding sound field of sound device audio, and the offset is received, the multiple void of the surrounding sound field is adjusted according to the offset
Quasi- loudspeaker audio.
2. apparatus for processing audio as described in claim 1, wherein the digital signal processor, which receives, carrys out a correction instruction, when this
When digital signal processor receives the correction instruction, which sets the home position.
3. apparatus for processing audio as described in claim 1, wherein the offset is a deviation angle, the digital signal processor
Judge whether the deviation angle is greater than a predetermined angle, if the deviation angle is greater than the predetermined angle, adjusts the multiple void
Quasi- loudspeaker audio.
4. apparatus for processing audio as claimed in claim 3, wherein according to the deviation angle of the user, corresponding adjustment institute
State the yield value of multiple virtual speaker audios and/or the output intensity of the multiple virtual speaker audio.
5. apparatus for processing audio as described in claim 1 further includes an input interface unit, a video-audio data is received, by this
Video-audio data is converted to the audio data, is sent to the digital signal processor.
6. apparatus for processing audio as described in claim 1 further includes an output interface unit, receives the surrounding sound field, to
It exports to an audio output device.
7. apparatus for processing audio as claimed in claim 6, wherein the output interface unit includes an Earphone Amplifier and more than one
Channel amplifier, exporting the surrounding sound field to the corresponding audio output device.
8. apparatus for processing audio as claimed in claim 7, wherein the audio output device is an earphone or a multichannel loudspeaking
Device, the digital signal processor select the surrounding sound field passing through the Earphone Amplifier or more sound according to the audio output device
Road amplifier is exported to the corresponding earphone or the multi-channel loudspeaker.
9. apparatus for processing audio as described in claim 1, further includes a microphone, which further includes a wheat
Gram wind interface, to receive the voice data from the microphone.
10. a kind of audio-frequency processing method is used for an apparatus for processing audio, comprising:
By a digital signal processor of the apparatus for processing audio, receives an audio data and virtually raised to generate with multiple
One surrounding sound field of sound device audio；
By the locating unit of the apparatus for processing audio, a home position and the latest position of a user are detected, is calculated
One offset of the latest position and the home position；And
The offset is received by the digital signal processor, the multiple virtual of the surrounding sound field is adjusted according to the offset
Loudspeaker audio.
11. audio-frequency processing method as claimed in claim 10, further includes:
A correction instruction is received by the digital signal processor, which sets the home position of the user.
12. audio-frequency processing method as claimed in claim 10, wherein the offset is a deviation angle, the Digital Signal Processing
Device judges whether the deviation angle is greater than a predetermined angle, if the deviation angle is greater than the predetermined angle, adjusts the multiple
Virtual speaker audio.
13. audio-frequency processing method as claimed in claim 12, wherein according to the deviation angle of the user, corresponding adjustment
The output intensity of the yield value of the multiple virtual speaker audio and/or the multiple virtual speaker audio.
14. audio-frequency processing method as claimed in claim 10, further includes:
By an input interface unit of the apparatus for processing audio, a video-audio data is received, which is converted into the sound
Frequency evidence is sent to the digital signal processor.
15. audio-frequency processing method as claimed in claim 10, further includes:
By an output interface unit of the apparatus for processing audio, the surrounding sound field is received, is filled to export to an audio output
It sets.
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| CN201710961840.8A CN109672956A (en) | 2017-10-16 | 2017-10-16 | Apparatus for processing audio and its audio-frequency processing method |
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| CN201710961840.8A CN109672956A (en) | 2017-10-16 | 2017-10-16 | Apparatus for processing audio and its audio-frequency processing method |
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| CN112752190A (en) * | 2019-10-29 | 2021-05-04 | 骅讯电子企业股份有限公司 | Audio adjusting method and audio adjusting device |
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